<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="lib/vue.js"></script>
</head>

<body>
    <div id="app">
        <input type="button" value="获取元素" @click="getElement">
        <h3 ref="myh3">阴雨绵绵</h3>

        <hr>

        <login ref="mylogin"></login>
    </div>


    <script>
        var login = {
            template: '<h1>登陆组件</h1>',
            data() {
                return {
                    msg: 'msg'
                }
            },
            methods: {
                show() {
                    console.log('调用了子组件的方法')
                }
            },
        }

        var vm = new Vue({
            el: '#app',
            data: {

            },
            methods: {
                getElement() {
                    // reg 是英文单词 reference   值类型和引用类型 referenceError
                    // console.log(this.$refs.myh3.innerText);

                    console.log(this.$refs.mylogin.msg)
                    this.$refs.mylogin.show()

                },
            },
            components: {
                login
            }
        });
    </script>
</body>

</html>